Alawn is in the shape of a right triangle with a perimeter of 215 feet. the lengths of the sides of the triangle are each multiplied by 7. what is the perimeter of the new triangle?

If f(x) = x+8 and g(x) = 4x- 3, find (f+g)(x)

After t seconds, a ball tossed in the air from the ground level reaches a height of h feet given by the equation h = 144t-16t^2. after how many seconds will the ball hit the ground before rebounding?

Is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis.